Hectograph



Dec. 27, 1932. J, REARDON 1,892,077

HECTOGRAPH ,Filed May 4, 1932 Patented Dec. 27, 1932 UNITED STATES PATENT OFFICE HARVEY J. REARDON, OF CHICAGO, ILLINOIS, ASSIGNR TO THE CLASSROOLI TEACHER, INC., OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS HECTOGRAPH Application filed May 4, 1932. Serial N0. 609,116.

This invention relates to certain novel im provements in hectographs.

This inventionrelates to that type of devices for manifolding an original which are commonly known as hectographs.

As commonly made these devices comprise a base and a flexible apron adapted to be laid upon the base and bearing a manifolding sheet of gelatin; and it is an object of this invention to provide, in combination with said base and apron, novel, improved, relatively inexpensive, easily operated, and facile means for clamping the apron and the gelatin sheet taut and rmly in manifolding position upon the base.

Fig. 1 is a perspective view lof a preferred form of the invention assembled in manifolding position;

Fig. 2 is a perspective fragmentary detail view illustrating my improved apron-clamping means in ineffective or disassembled position; and

Fig. 3 is a sectional detail of the apronclamping means, taken on line 3-3 in Fig. 1.

Referring to the drawing, which illustrates a preferred and practical form of my inven-k tion, 10 indicates my improved base or board upon which is laid a conventional flexible apron 11 to one surface of which is adhesively secured, in a manner well known in the art, a manifolding sheet 12 of gelatin.

It is desirable when manifolding from the gelatin sheet 12 that the apr-on 11 and the gelatin sheet 12 carried thereby be held taut and firmly upon the base 10. It is also desirable that the means for holding or clamping the apron 11 and gelatin sheet 12 uponl the base 10 be simple, relatively inexpensive, and easily and facilely operated.

To this end and to carry out the hereinbefore stated object of the invention, I provide in each end of the base 10 Va groove 13 and I provide a pair of clamping rod members 14 adapted to be received in the grooves 13 to hold the flexible end portions 15 of the apron 11 in said grooves.

To bind the rod members 14 and the apron portions 15 in the grooves 13 I provide a pair of bails or U-shaped clamping members 16, each of which has a slightly yieldable linger grip portion or handle 18 and parallel arms 17l that are movably or pivotally mounted on the side edge portions of the base 10, by screws 19 or the like.

Each of the clamping rod members 14 is inadeslightly larger in diameter than the horizontal depth of the grooves 13 so that when said rod members are disposed, with portions 15 of the apron 11, in the Agrooves 13, a portion 2O (Fig. 3) of each clamping rod member 14 projects outwardly beyond the mouth of the corresponding groove 13, each of whi ch grooves opens at its mouth out onto one of the end edges 21 of the base 10; whereby When the clamping members 16 are swung down into effective position, shown in full lines in Figs. 1 and 3, the slightly yieldable handle or finger grip portions 1S of the clamping members 16 engage the projecting portions 2O of the clamping rod members 14. Said portions 18 are thereby slightly bowed out and bind the clamping rod members 14 against the apron portions 15 and thus bind .said apron portions 15 rmly against the edges 22 of the grooves 13; thereby clamping the apron 11 and the gelatin manifolding sheet 12 carried thereby firmly and taut upon the base 10.

Thearms 17 of the clamping vmembers 16 when in effective position, as in Fig. 1, close the ends of the grooves 13 and prevent any possibility of axial movement therein of the rod members 14. f

Tounclamp the apron 11 from the base 10 it is merely necessary to push or lift upwardlyon the handle portions 18 of the clamping members 16 and rotate said clamping members upwardly into ineffective position (full lines, Fig. 2, dotted lines Fig. 3) whereupon the clamping rod members 14 and apron portions 15 may be removed from the grooves 13.

I claim: 1. A liectograph comprising a base having a groove formed in an end thereof, an apron extended over said base having a manifolding sheet attached thereto and including a flexible end portion receivable in said groove, la rod member receivable in said groove to hold-said apron portion therein, and a substantially U-shaped clamping memtion in said groove.

`2. A hectograph comprising a base having a groove formed in each end thereof, a flexible apron extended over said base having a manifolding sheet attached thereto and including l flexible end portions receivable in said grooves, rod members receivable in said grooves to hold said apron portions therein,

and substantially U-shaped clamping members each including a pair of arms pivotally mounted on said base at the sides thereof, each of said U-shaped clamping members including a portion extending between the said arms thereof, said clamping member portions being adapted in effective position to bear against said rod members to bind ythe latter and said apr-on portions in said grooves.

3. A hectograph comprising a base having Y a groove formed in an end thereof, an apron extended over said base having a manifolding sheet attached thereto and including a flexible end portion receivable in said groove, a rod member receivable in said groove to hold said apron portions therein, and a substantially U-shaped clamping member including arms pivotally mounted on said base on the sides thereof, said clamping member including a portion extending between said 1 arms adapted in effective position for bearing engagement with said rod member to bind the same andk said apron portion in said groove, said clamping member armsin effective position closing the ends of said groove and preventing axial movement of said rod mem er therein.

4. A hectograph comprising a base having a groove formed in each end thereof, a flexible apron extended over said base having a. manifolding sheet attached thereto and including flexible end portions receivable in said grooves, rod members receivable in said grooves to hold said apron portions therein, and substantiall U-shaped clamping members each including a pair of arms pivotally mounted on said base at the sides thereof, each of said U-shaped clamping members includ-ing a portion extending between the said arms thereof and said clamping memberportions being adapted in effective position to bear against said rod members to bind the latter and said apron portions in said grooves, said clamping member arms in effective position closing the ends of said grooves and reventing axial movement of said rod mem ers therein.V

5. A manifolding device, comprising a base havinga groove formed therein, a manifolding apron extended over said base having a vportion receivable in said groove, a.

rod-like member receivable in said groove to bind said apron portion therein, and a clamping bail having arms pivotally mounted on said base and including a portion extending between said arms adapted to bear against said rod-like member to bind the latter and said apron portion in said groove.

6. A manifolding device, comprising a base having grooves formed therein, a manifolding apron extended over said base having portions receivable in said grooves, rodlike members receivable in said grooves to bind said apron portions therein, and clamping bails each having arms pivotally mounted on said base, each of said bails including a portion extending between the arms thereof, said bail portions being adapted to bear against said rod-like members to bind the latter and said apron portions in said grooves.

In testimony whereof I afx my signature.

HARVEY J. REARDON. 

